The journalist is a professional - she knows how to work the microphone. And if the microphones are black and hard, she knows how to test them. It seems she wasn't expecting what happened, but by the looks of it, she liked it. Technically, both microphones work perfectly. :-)
This blonde didn't mind fondling herself, from what I could tell. So it's not strange that she's willing to take strangers inside her and agree to have sex in a van. What they did to her afterwards was a mundane matter.